How do i apoligize 2 him...?

okay im gonna sum everything up. whoeva answers please give me your best answer because i really love dis dude && cant stand da fact dat i might lose him...okay so last night on facebook i ws writin my ex. He wrote me first && was like i seen u at the basketball game && u was lookin good. I was like i no. Den he wrote back && was like i remember when u used 2 be crazy about me. I said haha i was young so. Den he was like u don grew up i might have 2 snag u. I said lol okay. Den he was like can we chill, i said okay lol. Den he jus kept askin questions....so i get on myspace && my boyfriend status say he mad. So i asked wat was wrong he was like u tell me....my friend i ain gonna say no names read u && carlton messages on face....so he gotta work 2 get u really....i was like omg dis boy girlfriend has his pword. so im tryanna explain 2 my boyfriend dat i din realize i was flirtin back && he's still not gettin it....but dis iss killin me PLEASE HELP!!!!